package cn.wolfcode.car.business.service.impl;


import cn.wolfcode.car.business.domain.StatementItem;
import cn.wolfcode.car.business.mapper.StatementItemMapper;
import cn.wolfcode.car.business.mapper.StatementMapper;
import cn.wolfcode.car.business.query.StatementItemQuery;
import cn.wolfcode.car.business.service.IStatementItemService;
import cn.wolfcode.car.common.base.page.TablePageInfo;
import cn.wolfcode.car.common.exception.BusinessException;
import cn.wolfcode.car.common.util.Convert;
import com.github.pagehelper.PageHelper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.util.List;


@Service
public class StatementItemServiceImpl implements IStatementItemService {
    @Autowired
    private StatementItemMapper statementItemMapper;
    @Autowired
    private StatementMapper statementMapper;


    @Override
    public TablePageInfo<StatementItem> query(StatementItemQuery qo) {
        PageHelper.startPage(qo.getPageNum(), qo.getPageSize());
        return new TablePageInfo<StatementItem>(statementItemMapper.selectForList(qo));
    }


    @Override
    public void save(StatementItem statementItem) {
        statementItemMapper.insert(statementItem);
    }

    @Override
    public StatementItem get(Long id) {
        return statementItemMapper.selectByPrimaryKey(id);
    }


    @Override
    public void update(StatementItem statementItem) {
        statementItemMapper.updateByPrimaryKey(statementItem);
    }

    @Override
    public void deleteBatch(String ids) {
        Long[] dictIds = Convert.toLongArray(ids);
        for (Long dictId : dictIds) {
            statementItemMapper.deleteByPrimaryKey(dictId);
        }
    }

    @Override
    public List<StatementItem> list() {
        return statementItemMapper.selectAll();
    }

    @Override
    public void saveItems(List<StatementItem> items) {
        StatementItem tempItem = items.remove(items.size() - 1);
        //打折金额
        BigDecimal discountAmount = tempItem.getItemPrice();
        //结算单id
        Long statementId = tempItem.getStatementId();
        //先删后加
        statementItemMapper.deleteByStatementId(statementId);
        BigDecimal totalAmount = new BigDecimal(0);
        BigDecimal totalQuantity = new BigDecimal(0);
        if(items.size()>0){
            for (StatementItem item : items) {
                statementItemMapper.insert(item);
                totalQuantity = totalQuantity.add(item.getItemQuantity());
                totalAmount = totalAmount.add(item.getItemPrice().multiply(item.getItemQuantity()));
            }
        }

        if(totalAmount.compareTo(discountAmount)<0){
            throw new BusinessException("非法操作，优惠金额不能大于总金额");
        }
        statementMapper.updateAmount(statementId, totalAmount, totalQuantity, discountAmount);

    }


}
